<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary"
                     @click="showAddCate">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格区域 -->
      <tree-table :data="cateList"
                  :columns="columns"
                  :selection-type="false"
                  :expand-type="false"
                  show-index
                  index-text="#"
                  border
                  :show-row-hover="false"
                  class="treeTable">
        <!-- 是否有效 -->
        <template slot="isok"
                  slot-scope="scope">
          <i class="el-icon-success"
             v-if="scope.row.cat_deleted === false"
             style="color: lightgreen; font-size: 20px; margin-left: 20px"></i>
          <i class="el-icon-error"
             v-else
             style="color: red; font-size: 20px; margin-left: 20px"></i>
        </template>
        <!-- 排序 -->
        <template slot="order"
                  slot-scope="scope">
          <el-tag size="mini"
                  v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag type='success'
                  size="mini"
                  v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag type="warning"
                  size="mini"
                  v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt"
                  slot-scope="scope">
          <el-button type="primary"
                     icon="el-icon-edit"
                     size="mini"
                     @click="editCateName(scope.row)">编辑</el-button>
          <el-button type="danger"
                     icon="el-icon-delete"
                     size="mini"
                     @click="removeCate(scope.row.cat_id)">删除</el-button>
        </template>
      </tree-table>
      <!-- 分页区域 -->
    </el-card>
    <!-- 分页区域 -->
    <el-pagination @size-change="handleSizeChange"
                   @current-change="handleCurrentChange"
                   :current-page="queryInfo.pagenum"
                   :page-sizes="[3, 5, 10, 15]"
                   :page-size="queryInfo.pagesize"
                   layout="total, sizes, prev, pager, next, jumper"
                   :total="total">
    </el-pagination>
    <!-- 添加分类的对话框 -->
    <el-dialog title="添加分类"
               :visible.sync="addCateDialogVisible"
               width="50%"
               @close="addCateDialongClosed">
      <!-- 添加分类的表单 -->
      <el-form :model="addCateForm"
               :rules="addCateFormRules"
               ref="addCateFormRef"
               label-width="100px">
        <el-form-item label="分类名称："
                      prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类：">
          <el-cascader expand-trigger="hover"
                       :options="parentCateList"
                       :props="cascaderProps"
                       v-model="selectedKeys"
                       @change="parentCateChanged"
                       clearable
                       change-on-select>
          </el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑分类的对话框 -->
    <el-dialog title="添加分类"
               :visible.sync="editCateDialogVisible"
               width="50%">
      <!-- 添加分类的表单 -->
      <el-form :model="editCateForm"
               :rules="addCateFormRules"
               ref="editCateFormRef"
               label-width="100px">
        <el-form-item label="分类名称："
                      prop="cat_name">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="editCateDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="editCate">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data () {
    return {
      // 商品分类的数据列表，默认为空
      cateList: [],
      // 查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      queryInfoo: {
        type: 2
      },
      columns: [
        { label: '分类名称', prop: 'cat_name' },
        { label: '是否有效', type: 'template', template: 'isok' },
        { label: '排序', type: 'template', template: 'order' },
        { label: '操作', type: 'template', template: 'opt' }

      ],
      // 总数据条数
      total: 0,
      addCateDialogVisible: false,
      editCateDialogVisible: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      parentCateList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedKeys: [],
      editCateForm: {
        cat_name: '',
        cat_id: ''
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取商品分类列表失败！')
      this.cateList = res.data.result
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCate () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    // 获取父级分类的列表
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfoo })
      if (res.meta.status !== 200) return this.$message.error('获取父级分类失败！')
      this.parentCateList = res.data
    },
    parentCateChanged () {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
      console.log(this.addCateForm)
    },
    addCate () {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        console.log(this.addCateForm)
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) return this.$message.error('添加分类失败！')
        this.$message.success('添加分类成功！')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialongClosed () {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
    },
    editCateName (cateName) {
      this.editCateForm.cat_id = cateName.cat_id
      this.editCateForm.cat_name = cateName.cat_name
      this.editCateDialogVisible = true
    },
    editCate () {
      this.$refs.editCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('categories/' + this.editCateForm.cat_id, {
          cat_name: this.editCateForm.cat_name
        })
        console.log(this.editCateForm)
        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('修改分类失败！')
        }
        this.$message.success('修改分类成功！')
        this.getCateList()
        this.editCateDialogVisible = false
      })
    },
    async removeCate (id) {
      console.log(id)
      const confirmResult = await this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除！')
      }
      const { data: res } = await this.$http.delete('categories/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除用户失败！')
      this.$message.success('删除用户成功！')
      this.getCateList()
    }

  }
}
</script>

<style scoped>
.treeTable {
  margin-top: 15px;
}

.el-cascader {
  width: 100%;
}
</style>
